What is the general solution for 4cos(x)=-2sqrt(2) ?

The general solution for 4cos(x)=-2sqrt(2) is x=(3pi)/4+2pin,x=(5pi)/4+2pin

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4cos(x)=-2sqrt(2)

4 cos (x) = - 22

x = \frac{3 π}{4} + 2 πn, x = \frac{5 π}{4} + 2 πn

Solution steps

4 cos (x) = - 22

Divide both sides by

4

cos (x) = - \frac{2}{2}

General solutions for

cos (x) = - \frac{2}{2}

x = \frac{3 π}{4} + 2 πn, x = \frac{5 π}{4} + 2 πn

tan (θ) = \frac{0.15}{0.5}

arctan (\frac{x}{12}) - arctan (x) = 0.001

2 = 2 cos (π + x)

cot (x) + csc (x) cos (x) = 2, cot (x)

- 4 cos (3 θ) = 1

What is the general solution for 4cos(x)=-2sqrt(2) ?
The general solution for 4cos(x)=-2sqrt(2) is x=(3pi)/4+2pin,x=(5pi)/4+2pin